Hydrometallurgical Recovery …
525
Fig. 6 Time-dependent changes of Sn concentration in the leachate during the burtite synthesis
Table 3 Ca/Sn ratio and Ca reaction efficiency
Ca/Sn (molar ratio)
0.5
1.0
1.5
2.0
Ca reaction efficiency (%)
43.5
45.9
45.4
49.9
Ca
Sn
SEM image
Ca
Sn
SEM image
Ca
Sn
SEM image
0 h
0.5 h
24 h
Fig. 7 SEM-EDS analysis of burtite
at Ca/Sn = 2 for 24 h. Composite morphology of the precipitates was observed
using SEM-EDS. Figure 7 illustrates the surface morphology of the calcite indicated
as “0 h” and the precipitates indicated as “0.5 h” and “24 h.” Sequential pictures
demonstrate that tin distribution on the calcite surface grows wider and thicker as
525
Fig. 6 Time-dependent changes of Sn concentration in the leachate during the burtite synthesis
Table 3 Ca/Sn ratio and Ca reaction efficiency
Ca/Sn (molar ratio)
0.5
1.0
1.5
2.0
Ca reaction efficiency (%)
43.5
45.9
45.4
49.9
Ca
Sn
SEM image
Ca
Sn
SEM image
Ca
Sn
SEM image
0 h
0.5 h
24 h
Fig. 7 SEM-EDS analysis of burtite
at Ca/Sn = 2 for 24 h. Composite morphology of the precipitates was observed
using SEM-EDS. Figure 7 illustrates the surface morphology of the calcite indicated
as “0 h” and the precipitates indicated as “0.5 h” and “24 h.” Sequential pictures
demonstrate that tin distribution on the calcite surface grows wider and thicker as